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材料Q235A(A3鋼) 挑內G1/2螺紋,用什么型號的成型刀片最好!? |
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小黑屋|手機版|Archiver|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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